Nanostabilization of tetragonal distorted FeCo variants in ultra-thin FeCo/TiN multilayer films

Atomic-Scale Description of the Magnetic TiN|FeCo Multilayers

“…The mismatch is not big enough to induce phase transitions, distortions, or strain-induced defects in the TiN|FeCo system. Also, Klever et al have experimentally demonstrated epitaxial growth between TiN and FeCo. ,, …”

“…The superlattice resulted in highly c-textured layers of FeCo and TiN consisting of at least three rotational domains. Alternatively, atomic position variation due to the tensile and compressive strains at the interfaces within the superlattice could also create minor discrepancies …”

“…Also, Klever et al have experimentally demonstrated epitaxial growth between TiN and FeCo. 31,47,48 The crystal structure of the TiN compound reveals that just one termination is possible for the (001) surface, which is formed by the combination of Ti and N atoms in the same monolayer (Figure 1b). On the other hand, the crystal structure of FeCo evidence four different terminations: the Co| Co surface (Figure 1c), where the lower and upper layers are composed of Co atoms; the Co|Fe surface (Figure 1d), where the lower and upper layers are composed of Co and Fe atoms, respectively; the Fe|Co surface (Figure 1e), where upper and lower surface terminations are composed of Fe and Co atoms, respectively; and the Fe|Fe surface (Figure 1f), where both lower and upper terminations are composed of Fe atoms.…”

“…Finally, it is possible to combine TiN and FeCo in the form of multilayers to build wear-resistant coatings that can simultaneously supply outstanding mechanical properties (TiN) as well as ferromagnetic properties (FeCo). , These can be tuned by controlling the layers’ thickness . In this way, these multilayers are suitable for applications in coatings for remote-interrogable wear sensors based on the inverse magnetostrictive effect and some other sensors based on magnetic properties, such as noncontact wear and magnetoelectric sensors and in biomagnetic imaging since this heterostructure combines the functionalities described above.…”

Photoelectrical performances of semiconductor-based devices having CoFe and CoFeNi magnetic interlayers

“…The inclusion of some elements such as copper (Cu) and Ni in the synthesized thin films can lead to improvements in corrosion resistance and a decrease in coercivity [19]. For this purpose, the magnetic and structural properties of alloyed films in different combinations such as CoFeNi, CoFeAlN, CoFeCu, CoNi, and FeCoTiN have been investigated by many researchers [20][21][22][23][24][25]. Similar to CoFe, CoFeNi alloys exhibit high saturation magnetization, which is beneficial for magnetic applications [26,27].…”